Filtering structure and ball valve with filtering structure

Abstract

The invention discloses a filtering structure and a ball valve with the filtering structure, and relates to the field of valves, the filtering structure comprises a filtering piece and a mounting seat, and the mounting seat is used for being mounted on the inner wall of the inlet end of the ball valve; the filtering piece is in an arch shape, the arc angle of the arch shape is larger than or equal to 180 degrees, and the filtering piece is connected with the mounting base through the arc edge of the arch shape; and the filter is used for shielding a rotary matching gap between the ball body and the valve body of the ball valve. The filter pieces can filter impurities in fluid, so that the phenomenon that the impurities in the fluid are accumulated at the inwards-concave included angle between the ball body and the inner wall of the valve body is reduced, and the problem that the ball valve is blocked when opened and closed is solved.

Description

Technical Field

[0001] This application relates to the field of valves, and particularly to a filtering structure and a ball valve with a filtering structure. Background Art

[0002] A ball valve is a relatively common type of valve. The plug body of the ball valve is a sphere, and the sphere has a circular through-hole. The ball valve is used in a pipeline to cut off, distribute, and change the flow direction of the medium. It only needs a 90-degree rotation operation and a very small torque to close tightly.

[0003] During the use of the ball valve, sometimes due to the need for flow control, it often remains in a semi-open state. When the ball valve is in a semi-open state, a concave included angle area is formed between the surface of the sphere of the ball valve and the inner wall of the valve body. Impurities carried in the water flow will accumulate in this included angle area and embed into the fitting gap between the sphere and the valve body, causing jamming problems during the opening and closing process of the ball valve. Summary of the Invention

[0004] In order to reduce the jamming problem during the use of the ball valve, this application provides a filtering structure and a ball valve with a filtering structure.

[0005] The filtering structure and the ball valve with a filtering structure provided by this application adopt the following technical solutions: A filtering structure includes a filter plate and a mounting seat. The mounting seat is used to be mounted on the inner wall of the inlet end of the ball valve; the filter plate is in an arc shape, and the arc angle of the arc shape is greater than or equal to 180 degrees. The filter plate is connected to the mounting seat through the arc edge of the arc shape; the filter plate is used to block the rotational fitting gap between the sphere and the valve body of the ball valve.

[0006] By adopting the above technical solutions, the filter plate is mounted on the inner wall of the inlet end of the ball valve. The filter plate covers the rotational fitting gap between the sphere and the valve body. The filter plate can filter impurities in the fluid, thereby reducing the accumulation of impurities in the fluid between the sphere and the valve body at the concave included angle, and thus reducing the jamming problem when the ball valve is opened and closed; and it can reduce the situation that impurities wear the sphere and the valve seat of the ball valve when the sphere rotates. The filter plate is set in an arc shape and does not completely block the passage inside the ball valve, which can reduce the resistance effect of the filtering structure on the ball valve; moreover, the impurities on the filter plate will be carried away by the water flow, and the filter plate rarely gets blocked, and generally no cleaning is required during the use of the filtering structure.

[0007] Optionally, the mounting seat is in a cylindrical structure. A limiting flange is provided at one end of the mounting seat. The limiting flange is used to abut against the outer surface of the flange of the ball valve. The filter plate is fixedly provided with an annular skeleton. A supporting ring is fixedly provided on the inner wall of the mounting seat. The supporting ring is used to support the annular skeleton, and the annular skeleton is in interference fit with the mounting seat.

[0008] By adopting the above technical solution, when installing the filtering structure, the annular skeleton is installed on the inner wall of the mounting seat in an interference fit manner, and then the mounting seat is installed on the inner side of the valve body of the ball valve, and the position of the mounting seat is restricted by the limiting flange. When the filter element filters the fluid medium, the acting force of the fluid medium on the filter element acts on the flange of the ball valve through the supporting ring, the mounting seat and the limiting flange in sequence.

[0009] Optionally, the limiting flange and the supporting ring are integrally provided with the mounting seat, and the mounting seat is provided with a longitudinal expansion joint, and the expansion joint penetrates through the limiting flange and the supporting ring at the same time.

[0010] By adopting the above technical solution, on the premise of setting the expansion joint, the mounting seat and the ball valve can adopt an interference fit. When the mounting seat is installed on the ball valve, the expansion joint contracts and deforms, so that the mounting seat can ensure a tight fit with the ball valve, and at the same time, the mounting seat is relatively easy to disassemble and assemble.

[0011] Optionally, the filter element is of a wedge-shaped structure, and the thickness of the filter element gradually decreases in the direction away from the arc edge.

[0012] By adopting the above technical solution, the filter element is set to a wedge-shaped structure, and the thickness gradually decreases in the direction away from the arc edge, so that the surface of the filter element facing the medium gradually inclines close to the sphere of the ball valve in the use state, so that the fluid medium can more easily take away the impurities on the surface of the filter element obliquely.

[0013] Optionally, the mounting seat is a snap ring, and the snap ring is used for clamping the inner relief groove of the ball valve, and the arc edge of the filter element is fixedly connected with the snap ring.

[0014] By adopting the above technical solution, using the snap ring as the mounting seat makes the installation of the filtering structure more convenient and helps to reduce the manufacturing cost of the filtering structure.

[0015] Optionally, a spiral spring is connected between the filter element and the snap ring, the spiral spring extends along the inner edge of the snap ring and is fixedly welded to the inner edge of the snap ring, and the spiral spring is fixedly welded to the filter element.

[0016] By adopting the above technical solution, when the snap ring clamps the inner relief groove of the ball valve, it needs to contract and deform. The filter element and the snap ring are fixedly welded through the spiral spring, so that the metal wire of the spiral spring can adapt to the inner contraction deformation of the snap ring, and the filter element is protected.

[0017] Optionally, the material of the filter element is powder metallurgy sintered material or metal fiber sintered material.

[0018] By adopting the above technical solution, making the filter element with powder metallurgy sintered material or metal fiber sintered material is beneficial to ensure the filtering accuracy of the filter element and is also beneficial to ensure the structural strength of the filter element.

[0019] A ball valve with a filtering structure includes a valve body, a ball and a filtering structure as described in any one of the above. The valve body is provided with two valve seats, and the two valve seats are respectively in sealing cooperation with both sides of the ball. The valve body is rotatably provided with two valve stems, and the two valve stems are perpendicular to each other. The valve stem includes a main stem and a telescopic stem. The telescopic stem includes a first rod section and a second rod section. The main stem is provided with a telescopic hole, and the telescopic hole includes a first insertion hole section and a second insertion hole section. The first insertion hole section is adapted to the first rod section, and the second insertion hole section is adapted to the second rod section; the ball is provided with a connection hole adapted to the first rod section, and torque can be transmitted between the first rod section and the inner wall of the connection hole; the main stem is provided with a sealing member for sealing the second insertion hole section.

[0020] By adopting the above technical solution, the valve body of the ball valve can be respectively matched with the ball through two valve stems. When the ball is matched with different valve stems, the rotation axes of the ball are different. When the ball valve is in use, one of the valve stems is used, and the other valve stem is used as a spare. The first rod section of the telescopic stem of the valve stem in the use state is inserted into the connection hole of the ball, and the first rod section of the telescopic stem of the valve stem used as a spare exits the connection hole of the ball; when the valve stem in use rotates and jams, the use states of the two valve stems can be switched, and the other valve stem is used to drive the ball to rotate around another axis, which helps to solve the problem of the ball valve jamming. When the ball valve is in use, the fitting clearance between the telescopic stem of the valve stem and the main stem is sealed by a sealing member.

[0021] Optionally, both the connection hole and the first insertion hole section are waist-shaped holes, the second insertion hole section is a circular hole, and the inner diameter of the second insertion hole section is greater than the major axis dimension of the first insertion hole section.

[0022] By adopting the above technical solution, setting the connection hole and the first insertion hole as waist-shaped holes is more convenient for machining by milling. The inner diameter of the second insertion hole section is greater than the major axis dimension of the first insertion hole section, so that the first rod section can pass through the second insertion hole section, so that the telescopic stem can completely exit from the telescopic hole, which is convenient for cleaning the telescopic hole and the connection hole.

[0023] Optionally, the sealing member is a set screw. The main stem is provided with a threaded hole adapted to the set screw. A stepped surface is formed between the threaded hole and the second insertion hole section. A sealing gasket is provided between the stepped surface and the set screw; one end of the second rod section away from the first rod section is provided with a traction rope, and the traction rope is located inside the second insertion hole section.

[0024] By adopting the above technical solution, when the set screw is locked, it squeezes the gasket together with the step surface, so that the second jack segment is sealed. When the set screw leaves the threaded hole, the towing rope can be exposed, and by dragging the towing rope, the telescopic rod can be taken out of the telescopic hole.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: The filter plate is installed on the inner wall of the inlet end of the ball valve. The filter plate covers the rotating fit gap between the ball and the valve body. The filter plate can filter impurities in the fluid, thereby reducing the accumulation of impurities in the fluid between the ball and the valve body at the concave angle, and thus reducing the problem of jamming when the ball valve is opened and closed; and it can reduce the situation where impurities wear the ball and the valve seat of the ball valve when the ball rotates.

[0026] The filter plate is set as a wedge-shaped structure, and the thickness gradually decreases along the direction away from the arc edge, so that the surface of the filter plate facing the medium gradually inclines close to the ball of the ball valve in the use state, so that the fluid medium can more easily tilt and take away the impurities on the surface of the filter plate.

[0027] Using the circlip as the mounting seat makes the installation of the filter structure more convenient and is conducive to reducing the manufacturing cost of the filter structure. Description of the Drawings

[0028] Figure 1 is a schematic diagram of the installation and use state of the filter structure in Embodiment 1.

[0029] Figure 2 is a schematic diagram of another perspective of the installation and use state of the filter structure in Embodiment 1.

[0030] Figure 3 is a cross-sectional view of the ball valve in Embodiment 1.

[0031] Figure 4 is a schematic diagram of the structure of the ball valve in Embodiment 1.

[0032] Figure 5 is a schematic diagram of the structure of the ball of the ball valve in Embodiment 1.

[0033] Figure 6 is Figure 3 the enlarged view of A in

[0034] Figure 7 is a schematic diagram of the installation and use state of the filter structure in Embodiment 2.

[0035] Figure 8 is a schematic diagram of the installation and use state of the filter structure in Embodiment 3.

[0036] Description of the Reference Numerals: 1. Filter structure; 11. Filter disc; 111. Annular skeleton; 12. Mounting seat; 121. Limiting flange; 122. Supporting ring; 123. Expansion joint; 2. Valve body; 21. Flow channel; 22. Inner relief groove; 3. Sphere; 31. Circular through hole; 32. Connecting hole; 33. Fine groove channel; 4. Valve seat; 5. Valve stem; 51. Main stem; 510. Expansion hole; 511. First jacking section; 512. Second jacking section; 513. Threaded hole; 514. Step surface; 52. Telescopic rod; 521. First rod section; 522. Second rod section; 523. Traction rope; 6. Sealing element; 61. Sealing gasket; 7. Rotational mating gap; 8. Helical spring. Detailed implementation mode

[0037] The following is a further detailed description of the present application in conjunction with the attached Figure 1-8 drawings.

[0038] Example 1, The embodiment of the present application discloses a filter structure. Refer to Figure 1 and Figure 2 , the filter structure includes a filter disc 11 and a mounting seat 12. The mounting seat 12 is used to be mounted on the inner wall of the inlet end of the ball valve. The filter disc 11 is in an arc shape, and the arc angle of the arc shape is greater than or equal to 180 degrees. The filter disc 11 is connected to the mounting seat 12 through the arc edge of the arc shape. The filter disc 11 is used to block the rotational mating gap 7 between the sphere 3 and the valve seat 4 of the ball valve.

[0039] Refer to Figure 1 , the mounting seat 12 is a cylindrical structure. The material of the mounting seat 12 is a non-rusting metal material such as stainless steel, copper alloy or titanium alloy. A limiting flange 121 is provided at one end of the mounting seat 12. The limiting flange 121 is used to abut against the outer side of the flange of the ball valve. An annular skeleton 111 is fixedly provided on the filter disc 11. A supporting ring 122 is fixedly provided on the inner wall of the mounting seat 12. The supporting ring 122 is located at the end of the mounting seat 12 far from the limiting flange 121. Both the supporting ring 122 and the limiting flange 121 are integrally connected to the mounting seat 12. The supporting ring 122 is used to support the annular skeleton 111. The annular skeleton 111 is a metal part. The annular skeleton 111 is fixedly welded to the filter disc 11. The annular skeleton 111 is in interference fit with the mounting seat 12.

[0040] Refer to Figure 2 , the center of the arc edge of the filter disc 11 coincides with the center line of the mounting seat 12. The filter disc 11 is a wedge-shaped structure. The thickness of the filter disc 11 gradually decreases in the direction away from the arc edge. The material of the filter disc 11 is a powder metallurgy sintered material or a metal fiber sintered material.

[0041] The filtering structure of the embodiment of the present application is applicable to a ball valve with a flange structure. The implementation principle of the filtering structure is as follows: when installing the filtering structure, the annular skeleton 111 is installed on the inner wall of the mounting seat 12 in an interference fit manner, and then the mounting seat 12 is installed inside the valve body 2 of the ball valve, and the position of the mounting seat 12 is restricted by the limiting flange 121. In the installed state of the filtering structure, the arc edge of the filtering piece 11 is close to the position where the sphere 3 enters and exits the valve seat 4, so that the filtering piece 11 covers the rotational mating gap 7 between the sphere 3 and the valve seat 4. The filtering piece 11 can filter impurities in the fluid, thereby reducing the accumulation of impurities in the fluid in the concave angle area between the sphere 3 and the valve body 2, so as to reduce the problem of jamming when the ball valve is opened and closed. The filtering piece 11 is set as an arc-shaped structure, which will not completely block the passage inside the ball valve, and can reduce the resistance of the filtering structure to the ball valve; moreover, the impurities on the filtering piece 11 will be carried away by the water flow, and the filtering piece 11 is rarely blocked, and the filtering structure usually does not need to be cleaned during use.

[0042] In addition, it should be noted that when the filtering structure is installed on a ball valve with a flange, the limiting flange 121 of the filtering structure is located inside the sealing gasket, and the thickness of the sealing gasket of the ball valve is greater than the thickness of the limiting flange 121. When the flange of the ball valve and the flange of the pipeline clamp the limiting flange 121 at the same time, the sealing gasket is already in a state of compressive deformation, and the limiting flange 121 will not affect the sealing effect of the ball valve and helps to reduce the situation of excessive compression damage of the sealing gasket.

[0043] The filtering structure of this embodiment is applicable not only to ball valves, but also to gate valves, globe valves, etc. The filtering structure can cover the mating position between the valve stem and the valve body of the gate valve or globe valve.

[0044] This embodiment also discloses a ball valve with a filtering structure. Referring to Figures 3-5 , the ball valve with a filtering structure includes a valve body 2, a sphere 3 and the above-mentioned filtering structure 1. The valve body 2 has a flow channel 21, the sphere 3 is installed in the middle position of the flow channel 21, the sphere 3 has a circular through hole 31, and two valve seats 4 are arranged in the flow channel 21 of the valve body 2. The two valve seats 4 are respectively in sealing fit with both sides of the sphere 3; two valve stems 5 are rotatably arranged on the valve body 2, the two valve stems 5 are perpendicular to each other, the valve stem 5 includes a main rod 51 and a telescopic rod 52, the telescopic rod 52 includes a first rod section 521 and a second rod section 522, the main rod 51 is provided with a telescopic hole 510, the telescopic hole 510 includes a first insertion hole section 511 and a second insertion hole section 512, the first insertion hole section 511 is adapted to the first rod section 521, the first insertion hole section 511 is an oval hole, the second insertion hole section 512 is adapted to the second rod section 522, the second insertion hole section 512 is a circular hole, and the inner diameter of the second insertion hole section 512 is greater than the major axis dimension of the first insertion hole section 511; the sphere 3 is provided with a connection hole 32 adapted to the first rod section 521, the connection hole 32 is an oval hole, and torque can be transmitted between the first rod section 521 and the inner wall of the connection hole 32.

[0045] Referring to Figure 3 and Figure 6 , a seal 6 is provided on the main rod 51, and the seal 6 is used to seal the second jacking section 512. The seal 6 is a set screw, and the main rod 51 is provided with a threaded hole 513 adapted to the set screw. A step surface 514 is formed between the threaded hole 513 and the second jacking section 512, and a gasket 61 is provided between the step surface 514 and the set screw; a towing rope 523 is provided at one end of the second rod section 522 away from the first rod section 521, and the towing rope 523 is located inside the second jacking section 512. In the case of removing the seal 6, the towing rope 523 can extend to the outside of the threaded hole 513, and the telescopic rod 52 can be taken out of the telescopic hole 510 by dragging the towing rope 523.

[0046] The valve body 2 of the ball valve can be respectively matched with the ball 3 through two valve stems 5. When the ball 3 is matched with different valve stems 5, the rotation axis of the ball 3 is different. When the ball valve is in use, one of the valve stems 5 is used, and the other valve stem 5 is used as a spare. The first rod section 521 of the telescopic rod 52 of the valve stem 5 in the use state is inserted into the connection hole 32 of the ball 3, and the first rod section 521 of the telescopic rod 52 of the valve stem 5 used as a spare exits the connection hole 32 of the ball 3; when the valve stem 5 in use rotates and jams, the use states of the two valve stems 5 can be switched, and the other valve stem 5 is used to drive the ball 3 to rotate around another axis, which helps to solve the problem of ball valve jamming. On the other hand, by providing two valve stems 5, when one of the valve stems 5 is worn out and fails, the other valve stem 5 can continue to be used, which is beneficial to increasing the service life of the ball valve.

[0047] Embodiment 2, Referring to Figure 7 , the mounting seat 12 in this embodiment is different from that in Embodiment 1. The mounting seat 12 in this embodiment is a snap ring, and the snap ring is used to clamp the internal relief groove 22 of the ball valve. The diameter of the arc edge of the filter sheet 11 is smaller than the outer diameter of the snap ring and larger than the inner diameter of the snap ring. The filter sheet 11 abuts against one side plane of the snap ring, and a spiral spring 8 is connected between the filter sheet 11 and the snap ring. The spiral spring 8 extends along the inner edge of the snap ring and is welded and fixed to the inner edge of the snap ring. The spiral spring 8 is welded and fixed to the filter sheet 11. When the snap ring is installed into the internal relief groove 22 of the ball valve, the wire of the spiral spring 8 can be adaptively deformed, so that the filter sheet 11 is protected.

[0048] The filter structure in this embodiment is applicable to a ball valve with an internal thread structure. When the filter structure is in use, it is directly installed in the relief groove of the internal thread structure of the ball valve, so that the installation of the filter structure is relatively convenient and is beneficial to simplifying the filter structure. When the filter structure is installed, the filter sheet 11 is relatively close to the water inlet of the ball valve with respect to the snap ring, reducing the direct scouring of the fluid on the spiral spring 8.

[0049] In addition, in order to keep the angular position of the filtering structure stable within the ball valve, a limiting member can be welded in the relief groove of the ball valve so that the limiting member is located between the two ends of the snap ring, and the position of the snap ring is limited by the limiting member.

[0050] Embodiment 3 Referring to Figure 8 , the difference between this embodiment and Embodiment 1 is that the mounting seat 12 is provided with a longitudinal expansion joint 123, and the expansion joint 123 penetrates through the limiting flange 121 and the supporting ring 122 at the same time. On the premise of setting the expansion joint 123, an interference fit can be adopted between the mounting seat 12 and the ball valve, so that while ensuring a tight fit between the mounting seat 12 and the ball valve, the mounting seat 12 is relatively easy to disassemble and assemble.

[0051] The above are all the preferred embodiments of this application. The protection scope of this application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A filtering structure, characterized in that: The invention comprises a filter plate (11) and a mounting seat (12), wherein the mounting seat (12) is used to be mounted on the inner wall of the inlet end of the ball valve; the filter plate (11) is in an arc shape, the arc angle of the arc shape is greater than or equal to 180 degrees, and the filter plate (11) is connected to the mounting seat (12) via the arc edge of the arc shape; the filter plate (11) is used to cover the rotational matching gap (7) between the ball body (3) and the valve body (2) of the ball valve.

2. A filtering structure according to claim 1, characterized in that: The mounting seat (12) is a cylindrical structure. A limiting flange (121) is provided at one end of the mounting seat (12). The limiting flange (121) is used to abut against the outer surface of the flange of the ball valve. The filter plate (11) is fixedly provided with an annular skeleton (111). A supporting ring (122) is fixedly provided on the inner wall of the mounting seat (12). The supporting ring (122) is used to support the annular skeleton (111). The annular skeleton (111) and the mounting seat (12) are interference fit.

3. A filtering structure according to claim 2, characterized in that: The limiting flange (121) and the supporting ring (122) are integrally arranged with the mounting seat (12); the mounting seat (12) is provided with an expansion joint (123) arranged in the longitudinal direction; the expansion joint (123) simultaneously passes through the limiting flange (121) and the supporting ring (122).

4. A filtering structure according to claim 1, characterized in that: The filter plate (11) is a wedge-shaped structure, and the thickness of the filter plate (11) gradually decreases in a direction away from the arc edge.

5. A filtering structure according to claim 1, characterized in that: The mounting seat (12) is a retaining spring, which is used to retain the inner cutter groove (22) of the ball valve, and the arc edge of the filter plate (11) is fixedly connected to the retaining spring.

6. A filtering structure according to claim 5, characterized in that: A coil spring (8) is connected between the filter plate (11) and the clamping spring, the coil spring (8) extending along the inner edge of the clamping spring and being welded and fixed to the inner edge of the clamping spring, and the coil spring (8) is welded and fixed to the filter plate (11).

7. A filtering structure according to claim 1, characterized in that: The material of the filter plate (11) is a powder metallurgy sintered material or a metal fiber sintered material.

8. A ball valve with a filtering structure, characterized in that: The invention comprises a valve body (2), a spherical body (3) and a filtering structure according to any one of claims 1 to 7, wherein the valve body (2) is provided with two valve seats (4), the two valve seats (4) are respectively sealed with two sides of the spherical body (3), the valve body (2) is rotatably provided with two valve stems (5), the two valve stems (5) are perpendicular to each other; the valve stem (5) comprises a main stem (51) and a telescopic stem (52), the telescopic stem (52) comprises a first stem section (521) and a second stem section (522), the main stem (51) is provided with a telescopic hole (510), the telescopic hole (510) comprises a first socket section (511) and a second socket section (512), wherein the first socket section (511) is adapted to the first rod section (521), and the second socket section (512) is adapted to the second rod section (522); the sphere (3) is provided with a connecting hole (32) adapted to the first rod section (521), and torque can be transmitted between the first rod section (521) and the inner wall of the connecting hole (32); the main rod (51) is provided with a sealing member (6), and the sealing member (6) is used to seal the second socket section (512).

9. The ball valve with a filtering structure according to claim 8, characterized in that: The connecting hole (32) and the first insertion hole section (511) are both waist-shaped holes, the second insertion hole section (512) is a round hole, and the inner diameter of the second insertion hole section (512) is larger than the long axis dimension of the first insertion hole section (511).

10. The ball valve with a filtering structure according to claim 8, characterized in that: The sealing member (6) is a set screw, the main rod (51) is provided with a threaded hole (513) adapted to the set screw, a step surface (514) is formed between the threaded hole (513) and the second insertion hole section (512), and a sealing gasket (61) is provided between the step surface (514) and the set screw; a traction rope (523) is provided at one end of the second rod section (522) away from the first rod section (521), and the traction rope (523) is located on the inner side of the second insertion hole section (512).

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